DC-Transformer 257LE-24-SD
Key figures
- ultrawide input voltage range: 10 ... 35 VDC
- very high efficiency: up to 98%
- peak input voltage: 37 VDC
- output voltage / max. output current: 24.0 VDC / 12.5 ADC
Applications
This non-isolated DC/DC buck-boost converter is widely used as the DC-Transformer 257LE and its 24V output at 12.5A typical short circuit current is used for stabilization of a 24V onboard power grid. The L-Version as 257LE-24-SD is designed to start up at about 9.5VDC and to step up the input voltage between 8V and 35V uncompromising to 24VDC. Its undervoltage lockout is 8VDC typical! Hence, supercapacitor powered electrical systems can be discharged to very low values or 12V battery systems can be regulated to 24V appropriately. Customer specific modifications as follows can be realized: 12V output, 13.8V output, 27V output, 36V output up to 55V output.
Features
- non-isolated DC/DC buck-boost converter
- robust and climate proof design
- excellent thermal characteristics
- permanently no-load and short-circuit proof
- integrated EMI input and output filter
- no power derating
- for ambient temperatures between -40°C / +85°C
- thermal shutdown at +90°C
- CC/CV charging characteristic
Take away
Product Family
| DC-Transformer | Input | Output | Power |
|---|---|---|---|
| 256E-24-SD | 15 ... 70 VDC | 24.0 VDC / 6.3 ADC | 150 W |
| 257E-24-SD | 15 ... 35 VDC | 24.0 VDC / 15.0 ADC | 360 W |
| 257E-28-SD | 15 ... 35 VDC | 28.0 VDC / 13.0 ADC | 360 W |
| 257E1-24-SD | 15 ... 35 VDC | 24.0 VDC / 15.0 ADC | 360 W |
| 257LE-24-SD | 10 ... 35 VDC | 24.0 VDC / 12.5 ADC | 300 W |
| 257LE1-29 | 6 ... 28 VDC | 29.0 VDC / 6.5 ADC | 180 W |
| 257LEX-12-SD | 7 ... 35 VDC | 12.0 VDC / 20.0 ADC | 240 W |
| 257LEX-24-SD | 7 ... 35 VDC | 24.0 VDC / 8.0 ADC | 200 W |
| 258E-24 | 15 ... 58 VDC | 24.0 VDC / 13.0 ADC | 300 W |
| 258E-50 | 20 ... 63 VDC | 50.4 VDC / 10.0 ADC | 500 W |
| 258E1-27.5-ON | 15 ... 58 VDC | 27.5 VDC / 8.0 ADC | 220 W |